首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Acid ran leads to fish mortality. Many species of fish cannot survive in aquatic environments there the PH is below 5.0. If the
Acid ran leads to fish mortality. Many species of fish cannot survive in aquatic environments there the PH is below 5.0. If the
admin
2013-01-30
16
问题
Acid ran leads to fish mortality. Many species of fish cannot survive in aquatic environments there the PH is below 5.0. If the water is too acid, the gill systems of many kinds of fish can be damaged. 46 , the acid alters the blood chemistry of all fish. As a result, the fish population in an acidic environment decreases 47 becomes extinct. Approximately 20 percent of the lakes in Scandinavia are without fish. Moreover, in Nova Scotia the 48 salmon industry may be threatened by the decrease of salmon in rivers and streams. The impact is also 49 in the waters of Ontario and Quebec, where fish populations are on the decline.
What potential remedies exist for the acid rain 50 ? The experts disagree. Some say new environmental laws should be enacted to control the emission of pollutants in the atmosphere. Some say that if we had known how serious acid rain was, we would have planne d 51 to prevent it. Nevertheless, all agree that if the consumption of fossil fuel were reduced, we would have less of a problem. Another 52 is that special scrubbers could be installed in smokestacks to remove a good 53 of the pollutants before they get into the atmosphere. Other ideas even include breeding more tolerant fish. And research suggests that spreading lime into lakes may be effective in 54 acidity. In conclusion, it is clear that if we truly want to reduce the impact of acid rain, a 55 of remedies and international cooperation must be explored. It is a sad fact that acid rain probably could have been avoided if we had known what we know now.
选项
A、descending
B、declining
C、reducing
D、relieving
答案
C
解析
备选项中A项:下来,下降,是不及物动词;B项:减少,衰落,是不及物动词;C项:使减少,是及物动词;D项:缓和,减轻,宾语经常是problem。依据句意生石灰将有助于减轻湖水的酸性,所以答案是C。
转载请注明原文地址:https://kaotiyun.com/show/M2hi777K
0
在职申硕(同等学力)英语
相关试题推荐
Revengeisoneofthosethingsthateveryoneenjoys.Peopledon’tliketotalkaboutit,though.Justthesame,thereisnothing
Thesentence"mostofthebestthingshavealreadybeenlocated"couldmean______.JohnHorgan______.Ⅰ.haspublishedabooke
Withonlyabout1,000pandasleftintheworld,Chinaisdesperatelytryingtoclonetheanimalandsavetheendangeredspecies.
Weare(at)acriticalpointinournation’shistoryandwecannotgobackasindividualsor(asacountry)to(what).weweret
Localgovernment______couldbeobtainedthroughalocalincometaxand/oralocalsalestax.
Seriously,(though),there’salways(somethingyouwish)you(havenotdone),but(whatisdone)cannotbeundone.
Aninternationaltreatysignedseveralyearsagobanstradeinplantsandanimalofendangeredspecies.
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
随机试题
复制、发行、通过信息网络向公众传播录音录像制品,应当取得()许可,并支付报酬。
我国领导体制改革的内容。
A.G蛋白的α亚基并使之失活B.G蛋白的β亚基并使之失活C.G蛋白的γ亚基并使之失活D.真核翻译延伸因子并使之失活E.真核翻译起始因子并使之失活霍乱毒素共价修饰
男性,46岁。肝硬化大量腹水,呼吸困难,用利尿剂后仍尿少。如需单纯放腹水。第一次放多少合适
砌体中常用的砂浆有以下几类:()
下列纳税人不能被认定为增值税一般纳税人的有()。
1907年革命家秋瑾被清政府杀害,在当时中国舆论中心的上海,几乎没有一家报纸不发出哀惋和抗争之声,仅《申报》第八天就刊出秋瑾诗六首,有关秋瑾的文字达三万多字,使得广大人民群众进一步认清了政府的反动本质。这一现象表明()。
某研究中共有3组被试,每组12人,进行方差分析时,误差自由度为()
设随机变量X1,X2,…,Xm+n(m<n)独立同分布,其方差为σ2,令Y=Xm+k.求:(1)D(Y),D(Z);(2)ρXY.
实体完整性约束要求关系数据库中元组的属性值不能为空的是()。
最新回复
(
0
)